Intercalation in bulk layered materials has been investigated intensively in the last 60 years. However, the rise of 2D few‐layered nanomaterials such as transition metal oxides and chalcogenides opened up thrilling opportunities for the new era of intercalation as it is almost guaranteed that new phenomena will be observed with the intercalation of ions and molecules into few‐layered nanomaterials due to the quantum confinement effect at the 2D scale. In this progress report, the advances of the 2D intercalation chemistry in the few‐layered oxides and chalcogenides of molybdenum and tungsten are highlighted with respect to its concept, structure, implementation, identification, property modulation, and applications. The perspective and outlook concerning its current obstacles and future opportunities are addressed. The 2D intercalation chemistry in few‐layered nanomaterials is still under its infant stage. The new intercalation phenomena behind the interlayer engineering of few‐layered nanomaterials need to be discovered and further comprehensively exploited. It is strongly believed that with more attentions and efforts put into this spring field, the few‐layered 2D nanomaterials will make great impact on the nanoscience and nanotechnology, enabling them more profound than their microstructural counterparts and even their monolayers.

中文翻译：

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用于二维过渡金属氧化物和硫属元素化物的亚纳米级夹层工程的新型插层化学功能化。

在过去的60年中，对块状层状材料中的插层进行了深入研究。但是，诸如过渡金属氧化物和硫族化物之类的二维少数层状纳米材料的兴起为新的插层时代开辟了令人振奋的机遇，因为几乎可以保证，随着离子和分子插入少数层状纳米材料中，将观察到新现象。归因于2D尺度上的量子限制效应。在此进展报告中，从概念，结构，实现，识别，性质调节和应用等方面着重强调了二维插层化学在钼和钨的几层氧化物和硫族化物中的进展。阐述了有关其当前障碍和未来机会的观点和前景。几层纳米材料中的2D插层化学仍处于起步阶段。需要发现并进一步综合利用几层纳米材料的层间工程背后的新插层现象。人们坚信，随着春季领域的更多关注和努力，层数少的2D纳米材料将对纳米科学和纳米技术产生巨大影响，使它们比其微结构对应物甚至单分子层更深刻。